Cooling or warming climatic background for the expansion of human activity in arid inland China and the Tibetan Plateau over the past ~4000 years?

Affiliations

• ¹ Key Laboratory of Ecological and Environmental Change in Subtropical Zone, College of Geographic Science, Hunan Normal University, Changsha 410081, China. Electronic address: raozhg@hunnu.edu.cn.
• ² Key Laboratory of Ecological and Environmental Change in Subtropical Zone, College of Geographic Science, Hunan Normal University, Changsha 410081, China.
• ³ Key Laboratory of Ecological and Environmental Change in Subtropical Zone, College of Geographic Science, Hunan Normal University, Changsha 410081, China. Electronic address: liyx@hunnu.edu.cn.
• ⁴ Center for Excellence in Tibetan Plateau Earth Sciences, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China.